First of all, I strongly recommend reading this right after The Last Colony. It’s been as long time since I read it and so it took some effort for me to remember the original story beats this was supposed to be referencing.
Second, Scalzi does a great job retelling the story and adding lots of depth to it. It brought a new perspective to events from the last book. The contrast between the way adults and teens handled things seemed spot on.
Third, just as the other books on the series, Scalzi does a good job of making the hero’s choices difficult, bringing some weight to the decisions they make.
Scalzi continues to be a favorite science fiction author for me, especially in the Old Man’s War universe.